The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 1979
Filed:
Jun. 13, 1977
Peter H Wolf, Campbell, CA (US);
Boyd E Slade, Sunnyvale, CA (US);
Dataproducts, Santa Clara, CA (US);
Abstract
A printing head for forming dot matrix characters which includes a wire stylus assembly having a plurality of guide bearings spaced to reduce the wear of the tip bearing, and to minimize buckling and resonances. Each stylus is driven by an electromagnetic actuator having a hinged armature, with the stylus drive point at the center of percussion of the armature with respect to the hinge line. Damping is effected at the same point. The armatures are shaped to drive the styli directly in line with the stylus wires without introducing a moment. Individual adjustments for magnetic gap are provided. A retainer device for holding all of the armatures in place during assembly is also provided.